Calf cramps are generally calf muscle spasms, which may be related to physiological or pathological factors, such as cold, low blood calcium, and medications. It can be treated with hot compresses and medication. 1. Physiological factors: commonly found in swimming, leg cold stimulation, muscle blood circulation is blocked, so that the muscle fibers spasmodic contraction caused by spasm. Hot compresses or physical therapy can be used to improve blood circulation and relieve symptoms. Before swimming, be sure to do a good job in preparation for the action, to prevent sudden calf cramps during swimming. 2. Pathological factors (1) Vitamin D deficiency: the parathyroid glands can not compensate for the increase in secretion, so that the blood calcium continues to fall, when it falls to a certain extent, it will increase neuromuscular excitability, thus causing involuntary spasm and contraction of calf muscles. Vitamin D preparations, such as cod liver oil, vitamin D3, etc., can be supplemented. (2) Osteoporosis: Bone density decreases rapidly, bone trabeculae are reduced, and a large loss of calcium occurs. A series of fluctuations of calcium ions within the muscles will occur accordingly, and the phenomenon of calf cramps will appear. Especially at night when sleeping more obvious and more frequent. Drink more milk and other calcium-containing foods, and take calcium carbonate tablets at the same time. The above medications are for reference only, and specific medications should be taken as prescribed by your doctor. When the calf muscle cramps, it is recommended to consult a doctor in time, follow the doctor’s instructions for further examination, and choose a reasonable treatment plan under the doctor’s comprehensive analysis.